Patents by Inventor Makoto Umehara
Makoto Umehara has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 12184359Abstract: The invention provides a mechanism for reducing residual frequency differences in distributed MIMO using a slave trigger, and increasing synchronization precision between APs. The communication device, which constitutes a wireless network by cooperating with another communication device, has a transmission unit for transmitting a frame for synchronization to the other communication device to cooperate with the other communication device. The transmission unit includes: a setting unit that sets a value exceeding 4 as a repetition number for an EHT Long Training Field (EHT-LTF) in a preset position of an EHT Signal Field (EHT-SIG-A) of a frame for synchronization; and a generation unit that generates a frame for synchronization, the frame including EHT-LTFs whose quantity is the set repetition number. The transmission unit transmits the generated frame to the other communication device.Type: GrantFiled: October 22, 2021Date of Patent: December 31, 2024Assignee: Canon Kabushiki KaishaInventor: Makoto Umehara
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Patent number: 12155521Abstract: A communication device communicates a physical (PHY) frame including a preamble and a data field. The preamble includes a Legacy Short Training Field (L-STF), a Legacy Long Training Field (L-LTF), a Legacy Signal Field (L-SIG), an EHT Signal Field (EHT-SIG-A), an EHT Short Training Field (EHT-STF), and an EHT Long Training Field (EHT-LTF), and the EHT-SIG-A includes fields indicating a modulation scheme and information indicating which one of a UC (Uniform Constellation) scheme and an NUC (Non Uniform Constellation) scheme is used as the modulation scheme, and the data field includes data that has undergone modulation corresponding to the modulation scheme and the information indicated by the fields.Type: GrantFiled: October 10, 2023Date of Patent: November 26, 2024Assignee: CANON KABUSHIKI KAISHAInventor: Makoto Umehara
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Patent number: 12150100Abstract: A communication device that supports first and second communication standards using an OFDMA (Orthogonal Frequency Division Multiple Access) technique allocates, based on a frequency resource that has been allocated for a first other communication device in accordance with the first communication standard that uses a first pattern for allocating a frequency resource, a frequency resource for a second other communication device that conforms to the second communication standard that uses a second pattern for allocating a frequency resource. The communication device specifies, from among frequency resources in the second pattern, a second frequency resource that partially or entirely overlaps with a first frequency resource that has been allocated to the first other communication device, and allocates a frequency resource that are not included in the second frequency resource in the second pattern to the second other communication device.Type: GrantFiled: May 19, 2022Date of Patent: November 19, 2024Assignee: CANON KABUSHIKI KAISHAInventor: Makoto Umehara
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Publication number: 20240313941Abstract: A communication apparatus according to an embodiment of the present disclosure includes: a ring-shaped transmission path which is disposed in one of a fixed part and a rotating part and includes a plurality of transmission paths each configured to transmit transmission data including a transmission signal and a clock signal; a first coupler disposed in the other of the fixed part and the rotating part and configured to receive the transmission data from one of the plurality of transmission paths; a determining unit configured to determine a regenerated clock signal based on the clock signal in accordance with a reception position in which the first coupler receives the transmission data from the one of the transmission paths; and a data generating unit configured to generate reception data on the basis of the transmission signal received by the first coupler and the regenerated clock signal.Type: ApplicationFiled: February 23, 2024Publication date: September 19, 2024Applicant: CANON MEDICAL SYSTEMS CORPORATIONInventor: Makoto UMEHARA
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Patent number: 11991678Abstract: There is provided a wireless communication apparatus that is able to perform a first wireless communication and a second wireless communication, the second wireless communication having power consumption lower than that of the first wireless communication. The wireless communication apparatus receives, from another wireless communication apparatus through the second wireless communication, information indicating a channel which the another wireless communication apparatus is able to use in the first wireless communication, selects a communication parameter to be provided to the another wireless communication apparatus based on the received information, the communication parameter being required by the another wireless communication apparatus to connect to an apparatus that forms a network in which the first wireless communication occurs; and transmits the selected communication parameter to the another wireless communication apparatus through the first wireless communication.Type: GrantFiled: April 26, 2022Date of Patent: May 21, 2024Assignee: Canon Kabushiki KaishaInventor: Makoto Umehara
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Publication number: 20240048433Abstract: A communication device communicates a physical (PHY) frame including a preamble and a data field. The preamble includes a Legacy Short Training Field (L-STF), a Legacy Long Training Field (L-LTF), a Legacy Signal Field (L-SIG), an EHT Signal Field (EHT-SIG-A), an EHT Short Training Field (EHT-STF), and an EHT Long Training Field (EHT-LTF), and the EHT-SIG-A includes fields indicating a modulation scheme and information indicating which one of a UC (Uniform Constellation) scheme and an NUC (Non Uniform Constellation) scheme is used as the modulation scheme, and the data field includes data that has undergone modulation corresponding to the modulation scheme and the information indicated by the fields.Type: ApplicationFiled: October 10, 2023Publication date: February 8, 2024Inventor: Makoto Umehara
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Patent number: 11817991Abstract: A communication device communicates a physical (PHY) frame including a preamble and a data field. The preamble includes a Legacy Short Training Field (L-STF), a Legacy Long Training Field (L-LTF), a Legacy Signal Field (L-SIG), an EHT Signal Field (EHT-SIG-A), an EHT Short Training Field (EHT-STF), and an EHT Long Training Field (EHT-LTF) and the EHT-SIG-A includes fields indicating a modulation scheme and information indicating which one of a UC (Uniform Constellation) scheme and an NUC (Non Uniform Constellation) scheme is used as the modulation scheme, and the data field includes data that has undergone modulation corresponding to the modulation scheme and the information indicated by the fields.Type: GrantFiled: August 24, 2021Date of Patent: November 14, 2023Assignee: CANON KABUSHIKI KAISHAInventor: Makoto Umehara
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Publication number: 20230346245Abstract: A magnetic resonance imaging apparatus according to an embodiment includes a main unit and a receiver coil unit. The main unit includes processing circuitry. The processing circuitry generates a first clock signal. The processing circuitry receives a clock signal sent by the receiver coil unit in a wireless manner, and generates a second clock signal. The processing circuitry performs, in a first time period which is based on pulse sequence information, phase control of a third clock signal, based on the phase difference between the first clock signal and the second clock signal; and stops the phase control in a second time period which is based on the pulse sequence information. Then, the processing circuitry sends the third clock signal in a wireless manner to the receiver coil unit.Type: ApplicationFiled: April 14, 2023Publication date: November 2, 2023Applicant: CANON MEDICAL SYSTEMS CORPORATIONInventor: Makoto UMEHARA
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Publication number: 20220394693Abstract: A communication device that supports first and second communication standards using an OFDMA (Orthogonal Frequency Division Multiple Access) technique allocates, based on a frequency resource that has been allocated for a first other communication device in accordance with the first communication standard that uses a first pattern for allocating a frequency resource, a frequency resource for a second other communication device that conforms to the second communication standard that uses a second pattern for allocating a frequency resource. The communication device specifies, from among frequency resources in the second pattern, a second frequency resource that partially or entirely overlaps with a first frequency resource that has been allocated to the first other communication device, and allocates a frequency resource that are not included in the second frequency resource in the second pattern to the second other communication device.Type: ApplicationFiled: May 19, 2022Publication date: December 8, 2022Inventor: Makoto Umehara
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Publication number: 20220394721Abstract: A communication device performs, based on a frequency resource that is to be allocated to communication of a first other communication device in accordance with a first communication standard, frequency resource allocation for communication of a second other communication device that conforms to a second communication standard. In the frequency resource allocation, in a case where the first other communication device and the second other communication device concurrently communicate with the communication device, a distribution of a first frequency resource to be allocated for communication using the first communication standard and a second frequency resource to be allocated for communication using the second communication standard in an available frequency band is determined, and a frequency resource included in the second frequency resource is allocated to the second other communication device.Type: ApplicationFiled: May 31, 2022Publication date: December 8, 2022Inventor: Makoto Umehara
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Publication number: 20220322432Abstract: A communication apparatus is capable of using a method of transmitting a signal using a plurality of wireless links, based on confirmation that a wireless medium related to one wireless link among the plurality of wireless links varying in frequency channels is idle for a random backoff time determined by a first method, and a method of transmitting a signal using one wireless link, based on confirmation that a wireless medium related to the one wireless link is idle for a random backoff time determined by a second method, wherein an expectation value of the random backoff time determined by the first method is larger than an expectation value of the random backoff time determined by the second method.Type: ApplicationFiled: June 21, 2022Publication date: October 6, 2022Inventor: Makoto Umehara
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Publication number: 20220256540Abstract: There is provided a wireless communication apparatus that is able to perform a first wireless communication and a second wireless communication, the second wireless communication having power consumption lower than that of the first wireless communication. The wireless communication apparatus receives, from another wireless communication apparatus through the second wireless communication, information indicating a channel which the another wireless communication apparatus is able to use in the first wireless communication, selects a communication parameter to be provided to the another wireless communication apparatus based on the received information, the communication parameter being required by the another wireless communication apparatus to connect to an apparatus that forms a network in which the first wireless communication occurs; and transmits the selected communication parameter to the another wireless communication apparatus through the first wireless communication.Type: ApplicationFiled: April 26, 2022Publication date: August 11, 2022Inventor: Makoto Umehara
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Patent number: 11337216Abstract: There is provided a wireless communication apparatus that is able to perform a first wireless communication and a second wireless communication, the second wireless communication having power consumption lower than that of the first wireless communication. The wireless communication apparatus receives, from another wireless communication apparatus through the second wireless communication, information indicating a channel which the another wireless communication apparatus is able to use in the first wireless communication, selects a communication parameter to be provided to the another wireless communication apparatus based on the received information, the communication parameter being required by the another wireless communication apparatus to connect to an apparatus that forms a network in which the first wireless communication occurs; and transmits the selected communication parameter the another wireless communication apparatus through the first wireless communication.Type: GrantFiled: June 22, 2020Date of Patent: May 17, 2022Assignee: Canon Kabushiki KaishaInventor: Makoto Umehara
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Publication number: 20220045724Abstract: The invention provides a mechanism for reducing residual frequency differences in distributed MIMO using a slave trigger, and increasing synchronization precision between APs. The communication device, which constitutes a wireless network by cooperating with another communication device, has a transmission unit for transmitting a frame for synchronization to the other communication device to cooperate with the other communication device. The transmission unit includes: a setting unit that sets a value exceeding 4 as a repetition number for an EHT Long Training Field (EHT-LTF) in a preset position of an EHT Signal Field (EHT-SIG-A) of a frame for synchronization; and a generation unit that generates a frame for synchronization, the frame including EHT-LTFs whose quantity is the set repetition number. The transmission unit transmits the generated frame to the other communication device.Type: ApplicationFiled: October 22, 2021Publication date: February 10, 2022Inventor: Makoto Umehara
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Publication number: 20210385118Abstract: A communication device communicates a physical (PHY) frame including a preamble and a data field. The preamble includes a Legacy Short Training Field (L-STF), a Legacy Long Training Field (L-LTF), a Legacy Signal Field (L-SIG), an EHT Signal Field (EHT-SIG-A), an EHT Short Training Field (EHT-STF), and an EHT Long Training Field (EHT-LTF) and the EHT-SIG-A includes fields indicating a modulation scheme and information indicating which one of a UC (Uniform Constellation) scheme and an NUC (Non Uniform Constellation) scheme is used as the modulation scheme, and the data field includes data that has undergone modulation corresponding to the modulation scheme and the information indicated by the fields.Type: ApplicationFiled: August 24, 2021Publication date: December 9, 2021Inventor: Makoto Umehara
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Publication number: 20200413403Abstract: There is provided a wireless communication apparatus that is able to perform a first wireless communication and a second wireless communication, the second wireless communication having power consumption lower than that of the first wireless communication. The wireless communication apparatus receives, from another wireless communication apparatus through the second wireless communication, information indicating a channel which the another wireless communication apparatus is able to use in the first wireless communication, selects a communication parameter to be provided to the another wireless communication apparatus based on the received information, the communication parameter being required by the another wireless communication apparatus to connect to an apparatus that forms a network in which the first wireless communication occurs; and transmits the selected communication parameter the another wireless communication apparatus through the first wireless communication.Type: ApplicationFiled: June 22, 2020Publication date: December 31, 2020Inventor: Makoto Umehara
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Patent number: 10791572Abstract: A communication apparatus, method of communication, and storage medium storing a computer program are provided. The communication apparatus selects, based on a first signal received from another apparatus that belongs to a BSS (Basic Service Set) complying with IEEE802.11 standard, a first or second mode. In the first mode, a first NAV (Network Allocation Vector) and a second NAV are maintained. In the second mode, one NAV is maintained. The first and second NAVs are updated based on signals received from another apparatus that does belongs to a first BSS, or does not belong to the first BSS, respectively. If the first mode is selected and the first NAV is not zero, the second NAV is zero, and a Trigger Frame (TF) complying with IEEE802.11ax standard is received, the communication apparatus responds to the TF. If the second NAV is not zero, the communication apparatus does not response to the TF.Type: GrantFiled: August 30, 2017Date of Patent: September 29, 2020Assignee: CANON KABUSHIKI KAISHAInventor: Makoto Umehara
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Publication number: 20180084584Abstract: Provided is a communication apparatus that selects whether to operate in a first mode in which one of a first period set for a first group to which the communication apparatus belongs and a second period set for a second group to which the communication apparatus does not belong is managed, or in a second mode in which both of the first period and the second period are managed, performs communication during a period while a managed period is the first period if the first mode is selected, and performs communication in a period that is during the first period and not in the second period if the second mode is selected.Type: ApplicationFiled: August 30, 2017Publication date: March 22, 2018Inventor: Makoto UMEHARA
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Patent number: 9805691Abstract: A display obtains a first image by image capturing, receives, from an external apparatus, a second image generated based on the first image, determines a communication quality with the external apparatus in reception of the second image, and controls to display the second image on a display unit until a value indicating a degree of degradation of the communication quality exceeds a first threshold as a result of determination, and display the first image on the display unit when the value indicating the degree of degradation of the communication quality exceeds the first threshold. The display controls to display the first image until the value indicating the degree of degradation of the communication quality becomes smaller than a second threshold smaller than the first threshold after exceeding the first threshold.Type: GrantFiled: July 2, 2015Date of Patent: October 31, 2017Assignee: Canon Kabushiki KaishaInventors: Makoto Umehara, Hiroichi Yamaguchi, Kazuki Takemoto
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Patent number: 9320004Abstract: A communication apparatus includes a detection unit configured to detect received powers of a plurality of radio signals received during a first predetermined time period from another apparatus, and a transmission unit configured to transmit by proxy identification information of the another apparatus using a detection result by the detection unit as at least one condition.Type: GrantFiled: March 5, 2013Date of Patent: April 19, 2016Assignee: Canon Kabushiki KaishaInventor: Makoto Umehara